/Engine/Plugins/Importers/USDImporter/Source/UnrealUSDWrapper/Public/USDListener.h
Analogous to pxr::SdfChangeList::Entry::InfoChange, describes a change to an attribute. Here we break off PropertyName and Field for simplicity
struct FAttributeChange
FString
Field
UE::FVtValue
NewValue
UE::FVtValue
OldValue
FString
PropertyName